https://www.pcgamer.com/rainbow-six-siege-cheaters-will-lose-their-seasonal-rank-and-rewards/

Earlier this month, Ubisoft provided a quick overview of its efforts to combat cheating in Rainbow Six Siege, which included a plan for a wave of bans on players with boosted accounts—that is, accounts whose MMR [Matchmaking Rating] has been artificially manipulated. Today it posted an update on that situation, saying that roughly 1,300 boosted players were suspended for 15 days this week, and promising harsher penalties to come. 

Suspended players will be returned to action before the end of the current season, but their ill-gotten gains will not. "We are currently assessing how we will be delivering this from a technical side, but all players sanctioned for this will have their rank and rewards removed prior to the launch of Season 3," Ubisoft wrote.